如何检查值是否为json对象? [英] How can I check if a value is a json object?

问题描述

我的服务器端代码返回一个值，该值在成功时为json对象，在失败时为字符串'false'.现在如何检查返回的值是否为json对象?

My server side code returns a value which is a json object on success and a string 'false' on failure. Now how can I check whether the returned value is a json object?

推荐答案

jQuery.parseJSON()应该返回类型为"object"的对象(如果字符串是JSON)，因此您只需使用typeof检查类型

jQuery.parseJSON() should return an object of type "object", if the string was JSON, so you only have to check the type with typeof

var response=jQuery.parseJSON('response from server');
if(typeof response =='object')
{
  // It is JSON
}
else
{
  if(response ===false)
  {
     // the response was a string "false", parseJSON will convert it to boolean false
  }
  else
  {
    // the response was something else
  }
}

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